What color is #0B3148?

#0B3148 is a very dark, vivid cyan-blue. In RGB it is rgb(11, 49, 72), and in HSL hsl(203, 73%, 16%).

Is #0B3148 accessible as text?

On white, #0B3148 has a contrast ratio of 13.57:1 (passes WCAG AA for body text); on black it is 1.55:1 (fails). For text placed on #0B3148, use white for the best readability.

What is the closest Tailwind color to #0B3148?

The nearest Tailwind CSS token is sky-950 (#052F4A).

What colors go well with #0B3148?

#0B3148 pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #47220B. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #0B3148 below.

Is #0B3148 good for buttons?

#0B3148 works well for buttons and highlights, but use white text on #0B3148 — black text only reaches 1.55:1, below the 4.5:1 needed for normal-size labels.

Is #0B3148 the same as CSS midnightblue?

No — #0B3148 is not the CSS named color midnightblue, but midnightblue (#191970) is the closest CSS named color.

#0B3148 Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #0B3148

Not just a swatch — here's how #0B3148 works with other colors. Named schemes with #0B3148 in its natural role, and a note on why the supporting colors balance it.

Coastal Morning Lead · 5 colors

Lead #0B3148 Accent #A5C4C0 Surface #DEDABF Secondary #9AA0A0 Anchor #1F344A

Prussian Blue opens this coastal palette with sea-glass and warm sand alongside it, grounded by driftwood grey and a deep-navy anchor.

Nordic Calm Accent · 5 colors

Accent #0B3148 Secondary #AEB4B8 Surface #F1F2F0 Support #7C93A6 Anchor #2E3236

Prussian Blue keeps this Nordic scheme quiet — cool greys and a soft white around it, a muted-blue support and a charcoal anchor.

Tech Product Signal · 5 colors

Signal #0B3148 Surface #14161A Highlight #F4F6F8 Secondary #5A6672 Accent #315167

Prussian Blue is the vivid signal in this product UI — on a near-black surface with cool white, a slate grey and a lighter tint of Prussian Blue.

Vintage Leather Lead · 5 colors

Lead #0B3148 Secondary #7F4439 Surface #E2DDC0 Accent #385245 Anchor #57233C

Prussian Blue plays the worn-leather lead, deepened by saddle brown and an oxblood anchor, softened by aged cream and cooled by a muted forest green.

Minimal Editorial Surface · 5 colors

Surface #F6F4EF Accent #0B3148 Secondary #48545D Support #969386 Ink #16140F

Prussian Blue is the single accent in this high-contrast editorial system — set on near-white paper against near-black ink, with a warm grey and a desaturated tint of Prussian Blue carrying the quiet middle.

Build a working theme in the generator →

Color Lab

How #0B3148 actually behaves in design work — read from its OKLCH lightness, chroma and hue, not just its raw numbers. Ten signals to help you decide where this color earns its place.

Warmth 33/100

Cool

Reads cool and recessive — calming, technical, good for trust-led UI.

Softness 30/100

Low

Firm and assertive — carries weight and contrast.

Depth 68/100

High

Deep and grounding — anchors a layout, strong dark-mode base.

Naturalness 0/100

Very low

Reads engineered rather than organic — synthetic, digital.

Vintage feel 32/100

Low

A faint retro warmth without tipping into sepia.

Luxury 70/100

High

Restrained and premium — deep, quiet, high-end packaging and fashion.

Brand distinctiveness 23/100

Low

Quiet and neutral — a supporting tone, not a signature.

UI accent fit 30/100

Low

Workable accent with care around contrast.

Surface fit 48/100

Moderate

Usable as a tinted surface in measured doses.

Print safety 86/100

Very high

Reproduces faithfully in CMYK — safe for packaging and print.

Pairs with #0B3148

For UI

For branding

For interior

For fashion

People also use #0B3148 with

Hunter Green Navy Bistre Platinum Charcoal

UI roles & guardrails

Primary action Safe as a filled button with white label. AAA

Body text Passes on white at 16px and above. Pass

Large display Fine for headings 24px+ on white. Pass

Background Pair with white text at 13.6:1. Use

Subtle surface Use #BED9EB for cards and hover fills. Tint 80

Avoid beside #0B1C47 — the hue gap is too small to read as intentional. Clash

In real applications

Not a swatch to memorise — a color to build with. Here is #0B3148 at work across the surfaces designers actually ship.

Website / UI

Northwind Sign up

Build faster.

A working theme, generated in seconds.

Dashboard

Revenue

$48.2k ▲ 12%

Brand

AVELINE

Studio

Poster

Nov 14 · 8PM

NIGHT
MARKET

Packaging

BLOOM

Botanical Wash

250 ml

Interior

Every model

Export

:root {
  --color-base: #0B3148;
  --color-base-rgb: 11 49 72;
  --color-base-oklch: oklch(29.9% 0.059 240.0);
  --color-50: #F1F9FD;
  --color-100: #DBEEFA;
  --color-200: #B9DDF4;
  --color-300: #88C3E7;
  --color-400: #5DA7D5;
  --color-500: #3A89BB;
  --color-600: #336C8E;
  --color-700: #2A4E65;
  --color-800: #1F3542;
  --color-900: #152128;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  prussian-blue: {
    50: '#F1F9FD',
    100: '#DBEEFA',
    200: '#B9DDF4',
    300: '#88C3E7',
    400: '#5DA7D5',
    500: '#3A89BB',
    600: '#336C8E',
    700: '#2A4E65',
    800: '#1F3542',
    900: '#152128',
  },
}

$base: #0B3148;
$base-ink: #FFFFFF;
$base-50: #F1F9FD;
$base-100: #DBEEFA;
$base-200: #B9DDF4;
$base-300: #88C3E7;
$base-400: #5DA7D5;
$base-500: #3A89BB;
$base-600: #336C8E;
$base-700: #2A4E65;
$base-800: #1F3542;
$base-900: #152128;
$base-hover: #092638;
$base-subtle: #9BC7E2;

{
    "color": {
        "base": {
            "value": "#0B3148",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F1F9FD",
                "type": "color"
            },
            "100": {
                "value": "#DBEEFA",
                "type": "color"
            },
            "200": {
                "value": "#B9DDF4",
                "type": "color"
            },
            "300": {
                "value": "#88C3E7",
                "type": "color"
            },
            "400": {
                "value": "#5DA7D5",
                "type": "color"
            },
            "500": {
                "value": "#3A89BB",
                "type": "color"
            },
            "600": {
                "value": "#336C8E",
                "type": "color"
            },
            "700": {
                "value": "#2A4E65",
                "type": "color"
            },
            "800": {
                "value": "#1F3542",
                "type": "color"
            },
            "900": {
                "value": "#152128",
                "type": "color"
            }
        }
    }
}